Train
AREX has separately ticketed services and station access constraints. The official visitor transport guide says foreign cards are accepted through relevant ticket machines or online purchase, but a foreign card is not a generic tap payment at the rail gate.
Airport bus
A bus can be better when the stop is close to the hotel and rail would require stairs or multiple changes. Service, late arrival and exact stop matter more than a generic fastest claim. Use current Incheon Airport and operator information.
Taxi
A taxi can make sense for a group, substantial luggage or a late arrival. Official guidance lists foreign-card acceptance for taxis, but keep a backup payment method. Any booking link on this page must be clearly disclosed and must not replace the comparison.